Article
Nanoscience & Nanotechnology
Le Fu, Bohan Wang, Junjie Song, Chenglong Xu, Guofu Xu, Qiuan Sun, Jiwu Huang, Hakan Engqvist, Wei Xia
Summary: The study investigated the effect of the content of crystalline phase on the mechanical properties of ZrO2-SiO2 nanocrystalline glass-ceramics (NCGCs). The results showed that NCGCs with 65 mol% ZrO2 had the highest flexural strength, while increasing the ZrO2 content beyond 65 mol% led to a decrease in strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Le Fu, Bohan Wang, Sharath Kumar Manjeshwar Sathyanath, Jiang Chang, Jianding Yu, Klaus Leifer, Hakan Engqvist, Qin Li, Wei Xia
Summary: In this study, ZrO2-SiO2 glass-ceramics with two different ZrO2 contents were prepared using aerodynamic levitation technology (ALT). The glass-ceramics were partially or fully melted by ALT, followed by rapid quenching to obtain spherical glass-ceramic beads. The crystalline phase of ZrO2 was affected by ZrO2 content, processing temperature, and the addition of yttrium. The microstructure of the glass-ceramics consisted of irregular-shaped ZrO2 micro-aggregates embedded in an amorphous SiO2 matrix, with lamellar twins and lattice defects formed within ZrO2 crystals.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Le Fu, Jinghua Wu, Sharath Kumar Manjeshwar Sathyanath, Bohan Wang, Klaus Leifer, Hakan Engqvist, Salvatore Grasso, Wei Xia
Summary: Ultrafast high-temperature sintering (UHS) was used to prepare ZrO2-SiO2 nanocrystalline glass-ceramics (NCGCs) with a high relative density of approximately 95% achieved in about 50 seconds. The UHS technology hindered the formation of ZrSiO4 and cristobalite while enhancing the stabilization of t-ZrO2. The resulting NCGCs exhibited a microstructure of spherical monocrystalline ZrO2 nanocrystallites embedded in an amorphous SiO2 matrix.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Le Fu, Bohan Wang, Yabin Zhu, Tielong Shen, Ying Deng, Guofu Xu, Jiwu Huang, Yucheng Feng, Liangting Sun, Wei Xia
Summary: Developing radiation-resistant materials and understanding structural damage caused by radiation are important goals for material scientists. In this study, ZrO2-SiO2 nanocrystalline glass-ceramics were irradiated with 1.4 MeV He ions at different fluences, and the resulting structural integrity and damage were investigated. The results showed that microstrain from the irradiation induced a phase transformation in the ZrO2 crystals, while the addition of yttrium stabilized the tetragonal-ZrO2 phase. Raman spectroscopy indicated changes in the electronic structure of the amorphous SiO2 component, and microscopy revealed the formation of microcracks and lattice defects as the main structural damage.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Yang Liu, Dangguo Yang, Lars Riekehr, Hakan Engqvist, Le Fu, Wei Xia
Summary: The study successfully prepared ZrO2-SiO2 nano crystalline glass-ceramics with a combination of mechanical properties and high translucency. By varying compositions and sintering temperatures, glass-ceramics with high flexural strength and fracture toughness were obtained. This material has great potential for a wide range of applications in the future.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Luyza Bortolotto Teixeira, Elisangela Guzi de Moraes, Antonio Pedro Novaes de Oliveira
Summary: Ion exchange is a chemical method that can enhance the mechanical strength of glass-based materials. The study found that ion exchange in lithium-based sintered glass-ceramics can increase the mechanical strength but also decrease it.
Article
Materials Science, Ceramics
Le Fu, Fuqing Jiang, Bo Li, Yongxin Cheng, Guofu Xu, Jiwu Huang, Hakan Engqvist, Wei Xia
Summary: The addition of tantalum, niobium, and hafnium elements enhanced the transformability of ZrO2 nanocrystallites, forming a ZrO2 solid solution and lamella nanotwins. During thermal treatments, t-ZrO2 and m-ZrO2 nanocrystallites had a great tendency to grow larger.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Leibo Deng, Zhe Fu, Zhang Mingxing, Hao Li, Bin Yao, Jianli He, Hua Chen, Yonghong Ma
Summary: The addition of ZrO2 increased glass stability and decreased crystallization ability; at higher temperatures, mullite and quartz phases first precipitated in the glass matrix, then converted into cordierite.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Le Fu, Bohan Wang, Ying Deng, Guofu Xu, Jiwu Huang, Hakan Engqvist, Wei Xia
Summary: Liquid-phase sintering (LPS) was achieved in a ZrO2-SiO2 nanocrystalline glass-ceramic through a multielement co-doping strategy, which promoted densification at lower temperatures and faster rates compared to undoped samples. Ternary doping facilitated the coarsening of ZrO2 nanocrystallites during sintering. The distribution of dopants was analyzed using X-ray energy-dispersive spectrometry and it was found that Y dopants mainly distributed in ZrO2 nanocrystallites, while Al and Ca dopants segregated at the ZrO2/SiO2 heterointerfaces. The redistribution of dopants did not occur during annealing.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Lulu Wang, Beiyue Ma, Xinming Ren, Chao Yu, Chengji Deng, Chunming Liu, Chuanbo Hu
Summary: This study aimed to enhance the sintering and mechanical performance of porous cordierite ceramics by introducing ZrO2 and MxOy. The results showed significant improvement in mechanical and thermal performance, particularly for samples co-doped with ZrO2 and La2O3. This work offers a feasible strengthening strategy and expands the possibilities for high-performance ceramics.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Jianghai Huang, Jinhao Zhang, Yuanjie Yu, Haitao Bai, Zaili Zhang, Yongqian Huang
Summary: Transparent spinel glass-ceramics were prepared by selecting tin dioxide and zirconia as nucleating agents and adjusting the crystallization temperature. The effect of crystallization temperature on the properties of the glass-ceramics was investigated. The results showed that the crystallization temperature affected the crystallization properties, microstructure, and mechanical properties of the glass-ceramics. In the optimal preparation condition, the glass-ceramics exhibited excellent transparency and mechanical properties.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Bohan Wang, Guofu Xu, Jiwu Huang, Hakan Engqvist, Wei Xia, Le Fu
Summary: This study investigated the effects of dopants with different valences on the densification behavior and phase composition of ZrO2-SiO2 nanocrystalline glass-ceramic during pressureless sintering. It was found that Ca2+ and La3+ ions doping significantly promoted densification, while dopants also showed significant effects on phase compositions during sintering. Ca2+ ion accelerated the reaction kinetics between ZrO2 nanocrystallites and SiO2, while La3+ destabilized t-ZrO2 leading to a rapid phase transformation.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Julia Lubauer, Renan Belli, Anselm Petschelt, Maria Rita Cicconi, Katrin Hurle, Ulrich Lohbauer
Summary: The crystallization kinetics of two pre-crystallized multicomponent dental glass-ceramics were investigated, showing that the isothermal stage is dominated by the transformation of Li2SiO3 in Li2Si2O5, inducing the impingement of nanocrystals into clusters. The kinetics of toughening closely followed the evolution of crystallinity in both systems.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Xiaoyan Liu, Kang Zhao, Hua Jiao
Summary: In this study, the phase stability of NaNbO3 AFE material was successfully achieved by modifying the K+ content in NaO-Nb2O5-CaO-B2O3-SiO2-ZrO2-xK+ glass-ceramics. It was found that the stability of the AFE phase decreased and impurity phases precipitated in the glass-ceramic when the K+ doping concentration exceeded 4%.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Leonardo Sant'Ana Gallo, Fabrice Celarie, Jefferson Bettini, Ana Candida M. D. Rodrigues, Tanguy Rouxel, Edgar D. Zanotto
Summary: In this study, transparent glass-ceramics with high hardness and fracture toughness were obtained through a refined heat-treatment protocol. The mechanical properties, including fracture toughness and hardness, were characterized and compared with the parent glass.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Bohan Wang, Guofu Xu, Jiwu Huang, Hakan Engqvist, Wei Xia, Le Fu
Summary: This study investigated the effects of dopants with different valences on the densification behavior and phase composition of ZrO2-SiO2 nanocrystalline glass-ceramic during pressureless sintering. It was found that Ca2+ and La3+ ions doping significantly promoted densification, while dopants also showed significant effects on phase compositions during sintering. Ca2+ ion accelerated the reaction kinetics between ZrO2 nanocrystallites and SiO2, while La3+ destabilized t-ZrO2 leading to a rapid phase transformation.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Bo Li, Guofu Xu, Bohan Wang, Jiwu Huang, Hakan Engqvist, Wei Xia, Le Fu
Summary: Zirconia-based ceramics are popular in dental implantology due to their natural color and mechanical properties, but their biological inertness limits tissue integration. Doping with calcium and phosphorus in ZrO2-SiO2 nanocrystalline glass-ceramics enhances bioactivity and alters crystal phases during sintering, affecting strength and hardness. The resulting NCGCs exhibit plastic deformation behavior and sustained ion release, showing good biological activity and potential for sub-gingival applications.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Le Fu, Bohan Wang, Junjie Song, Chenglong Xu, Guofu Xu, Qiuan Sun, Jiwu Huang, Hakan Engqvist, Wei Xia
Summary: The study investigated the effect of the content of crystalline phase on the mechanical properties of ZrO2-SiO2 nanocrystalline glass-ceramics (NCGCs). The results showed that NCGCs with 65 mol% ZrO2 had the highest flexural strength, while increasing the ZrO2 content beyond 65 mol% led to a decrease in strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Le Fu, Lei Li, Yongxin Cheng, Bohan Wang, Hui Wu
Summary: Morphology plays an important role in ceramic sintering, but is often overlooked. This study synthesized ZrO2-SiO2 powders with fiber and particle morphologies and found that the particle powder exhibited higher densification driving force and specific surface area during hot pressing. The researchers also observed that the nanocrystallites in the glass-ceramics formed from particle powder had higher stability than those from fiber powder.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Jinghua Wu, Milad Kermani, Lei Cao, Bohan Wang, Zhiquan Dai, Le Fu, Chunfeng Hu, Salvatore Grasso
Summary: In this study, a new ultra-fast high-temperature sintering technique was proposed to achieve reactive consolidation and crystallization of the solid electrolyte in a single step within 16 minutes. Compared to conventional crystallization, the samples produced using this technique exhibited better phase purity, reduced Li loss, and improved ionic conductivity. In fact, the specimens achieved a crystallinity of 90% and an ionic conductivity as high as 1.31 x 10(-4) S cm(-1).
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Le Fu, Bohan Wang, Sharath Kumar Manjeshwar Sathyanath, Jiang Chang, Jianding Yu, Klaus Leifer, Hakan Engqvist, Qin Li, Wei Xia
Summary: In this study, ZrO2-SiO2 glass-ceramics with two different ZrO2 contents were prepared using aerodynamic levitation technology (ALT). The glass-ceramics were partially or fully melted by ALT, followed by rapid quenching to obtain spherical glass-ceramic beads. The crystalline phase of ZrO2 was affected by ZrO2 content, processing temperature, and the addition of yttrium. The microstructure of the glass-ceramics consisted of irregular-shaped ZrO2 micro-aggregates embedded in an amorphous SiO2 matrix, with lamellar twins and lattice defects formed within ZrO2 crystals.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Le Fu, Bohan Wang, Ying Deng, Guofu Xu, Jiwu Huang, Hakan Engqvist, Wei Xia
Summary: Liquid-phase sintering (LPS) was achieved in a ZrO2-SiO2 nanocrystalline glass-ceramic through a multielement co-doping strategy, which promoted densification at lower temperatures and faster rates compared to undoped samples. Ternary doping facilitated the coarsening of ZrO2 nanocrystallites during sintering. The distribution of dopants was analyzed using X-ray energy-dispersive spectrometry and it was found that Y dopants mainly distributed in ZrO2 nanocrystallites, while Al and Ca dopants segregated at the ZrO2/SiO2 heterointerfaces. The redistribution of dopants did not occur during annealing.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Le Fu, Bohan Wang, Yabin Zhu, Tielong Shen, Ying Deng, Guofu Xu, Jiwu Huang, Yucheng Feng, Liangting Sun, Wei Xia
Summary: Developing radiation-resistant materials and understanding structural damage caused by radiation are important goals for material scientists. In this study, ZrO2-SiO2 nanocrystalline glass-ceramics were irradiated with 1.4 MeV He ions at different fluences, and the resulting structural integrity and damage were investigated. The results showed that microstrain from the irradiation induced a phase transformation in the ZrO2 crystals, while the addition of yttrium stabilized the tetragonal-ZrO2 phase. Raman spectroscopy indicated changes in the electronic structure of the amorphous SiO2 component, and microscopy revealed the formation of microcracks and lattice defects as the main structural damage.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Song Chen, Dachuan Liu, Le Fu, Bing Ni, Zongkun Chen, Jennifer Knaus, Elena V. Sturm, Bohan Wang, Havard Jostein Haugen, Hongji Yan, Helmut Coelfen, Bin Li
Summary: This study reports the synthesis and characterization of an iron-bearing amorphous calcium phosphate, along with its potential application in biomineralization and as a starting material for acid-resistant high-performance bioceramics. The prepared material shows high stability and biocompatibility in aqueous media, and the ceramics composed of iron-calcium phosphates demonstrate enhanced acid resistance and hardness.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Ceramics
Le Fu, Jinghua Wu, Sharath Kumar Manjeshwar Sathyanath, Bohan Wang, Klaus Leifer, Hakan Engqvist, Salvatore Grasso, Wei Xia
Summary: Ultrafast high-temperature sintering (UHS) was used to prepare ZrO2-SiO2 nanocrystalline glass-ceramics (NCGCs) with a high relative density of approximately 95% achieved in about 50 seconds. The UHS technology hindered the formation of ZrSiO4 and cristobalite while enhancing the stabilization of t-ZrO2. The resulting NCGCs exhibited a microstructure of spherical monocrystalline ZrO2 nanocrystallites embedded in an amorphous SiO2 matrix.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Bohan Wang, Le Fu, Junjie Song, Wenjun Yu, Ying Deng, Guofu Xu, Jiwu Huang, Wei Xia
Summary: A low-temperature strategy was proposed to design and fabricate ZrSiO4-based ceramic composites by controlling the solid-state reaction between zirconia and silica. Two ceramic composites and ZrSiO4 ceramics were successfully prepared using reactive fast hot pressing at approximately 1250 degrees C based on this strategy. The phase compositions, microstructure configurations, mechanical properties, and wear resistance of the materials can be flexibly regulated by this strategy. Therefore, ZrSiO4-based ceramic composites with different properties can be easily fabricated based on different application scenarios.
JOURNAL OF ADVANCED CERAMICS
(2023)